A 36-year-old Nepali climber named Nirmal Purja has reached the summit of the world's 14 highest mountains (all at least 26,350 feet tall) in just over six months.
Why it matters: The fastest previous ascent of all 14 peaks — which are all in the Himalayan and Karakoram ranges that stretch across China, India, Nepal and Pakistan — took nearly eight years. He smashed the record to smithereens. Purja credits his endurance to his natural physiology and his intense military training. Prior to attempting this feat, he spent 10 years in the British special forces.